Write a function that takes a list of drinks and returns a list of only drinks with no sugar in them. Drinks that contain sugar (in this challenge) are:
skip_the_sugar(["fanta", "cola", "water"]) ➞ ["water"]
skip_the_sugar(["fanta", "cola"]) ➞ []
skip_the_sugar(["lemonade", "beer", "water"]) ➞ ["lemonade", "beer", "water"]